Exchange Market Pressure on the Croatian Kuna

EXCHANGE MARKET PRESSURE ON THE CROATIAN KUNA Srđan Tatomir* Professional article** Institute of Public Finance, Zagreb and UDC 336.748(497.5) University of Amsterdam JEL F31 Abstract Currency crises exert strong pressure on currencies often causing costly economic adjustment. A measure of exchange market pressure (EMP) gauges the severity of such tensions. Measuring EMP is important for monetary authorities that manage exchange rates. It is also relevant in academic research that studies currency crises. A precise EMP measure is therefore important and this paper re-examines the measurement of EMP on the Croatian kuna. It improves it by considering intervention data and thresholds that ac- count for the EMP distribution. It also tests the robustness of weights. A discussion of the results demonstrates a modest improvement over the previous measure and concludes that the new EMP on the Croatian kuna should be used in future research. Key words: exchange market pressure, currency crisis, Croatia 1 Introduction In an era of increasing globalization and economic interdependence, fixed and pegged exchange rate regimes are ever more exposed to the danger of currency crises. Integrated financial markets have enabled speculators to execute attacks more swiftly and deliver devastating blows to individual economies. They occur when there is an abnormally large international excess supply of a currency which forces monetary authorities to take strong counter-measures (Weymark, 1998). The EMS crisis of 1992/93 and the Asian crisis of 1997/98 are prominent historical examples. Recently, though, the financial crisis has led to severe pressure on the Hungarian forint and the Icelandic kronor, demonstrating how pressure in the foreign exchange market may cause costly economic adjustment. * I would like to thank Franc Klaassen from the University of Amsterdam, Ivo Krznar from the Croatian Na- tional Bank and two anyonymous referees for their helpful and constructive comments. I would also like to thank the Institute of Public Finance, which has provided a supportive environment for this research. ** Received: September 3, 2008 ** Accepted: April 1, 2009 187 S. Tatomir: Exchange Market Pressure on the Croatian Kuna Financial Theory and Practice 33 (2) 187-199 (2009) The Croatian exchange rate regime is no exception. The Croatian kuna came under strong speculative pressure in 1999 at the end of a domestic banking crisis that resulted in the depreciation of the kuna and a contraction in output. In 2001, a combination of monetary relaxation and financial liberalization led to renewed pressure on the kuna. The kuna depreciated again although economic growth remained robust. Since 2001, the Croatian National Bank (CNB) has continued targeting the nominal exchange rate to anchor inflation expectations. It has consistently built up international reserves and has often intervened in the foreign exchange market to ward off appreciation pressure and maintain exchange rate stability. In the recent financial crisis, however, the CNB responded to strong speculative pressure and intervened to prevent kuna depreciation. Such tensions in the foreign exchange market can be best explained by the concept of exchange market pressure (EMP). Pioneered by Girton and Roper (1977), EMP measures the exchange rate change that would have occurred in the absence of the authorities’ intervention. In a freely floating regime all pressure is reflected in the exchange rate change. In intermediate and fixed regimes, however, pressure is only partially reflected in the exchange rate change as authorities intervene through buying or selling of foreign currency and use interest rates to offset pressure on the exchange rate. Thus, a measure of such ac- tivity gauges the severity of pressure in an exchange rate regime. Measuring EMP is important for two reasons. Firstly, it is relevant for monetary authorities that pursue some form of exchange rate management. EMP on neighboring coun- tries’ currencies might indicate how much pressure monetary authorities could expect on their own currency due to contagion. In a similar vein, an EMP measure can be used in assessing whether specific policy instruments were successful in removing pressure. Fur- thermore, EMP is also relevant for a country’s credit ratings especially if a large portion of the country’s debt is foreign currency-denominated as was the case with Latvia’s recent downgrading (Klaassen and Jager, 2008: 4). Secondly, a measure of EMP is relevant in research. Eichengreen et al. (1996) use it to study vulnerability to currency crises while Rose and Svensson (1994) employ EMP to test European exchange rate credibility before the EMS crisis of 92/93. Van Poeck et al. (2007) examine whether the new EU members’ fundamentals are strong enough to participate in ERM II and Frankel and Wei (2008) use EMP to classify exhange rate regimes. In Croatia, a small, open and highly euroized economy, EMP is definitely relevant. The EMP is useful to the CNB in its pursuit of exchange rate stability. Croatian research that aims to develop early warning indicators of a currency crisis such as Ahec-Šonje and Babić (2002) and Krznar (2004) uses EMP to identify crises. In this respect, it is para- mount to capture EMP as precisely as possible. However, the measure of EMP on the Croatian kuna used in the literature has some drawbacks. This paper will, therefore, at- tempt to improve the measurement of EMP on the Croatian kuna. It will analyze EMP composition with respect to the latest theoretical advances and the structural aspects of the Croatian economy. The revised EMP measure will offer a new perspective on the last ten years of EMP on the kuna. It will also be empirically compared to the current measure and its impact on EMP measurement will be assessed. To this end, Section II will review the relevant approaches to measuring EMP. Section III will then present and explain the measure especially in the context of Croatian mone- 188 S. Tatomir: Exchange Market Pressure on the Croatian Kuna Financial Theory and Practice 33 (2) 187-199 (2009) tary policy. Section IV offers a new perspective on the last ten years and an empirical com- parison with the current measure of EMP on the kuna. Section V will then conclude. 2 Approaches to measuring EMP EMP measures the exchange rate change that would have occurred in the absence of involvement by the authorities. It is intuitive but inherently unobservable. Consequently, it must be approximated through a combination of variables. To derive and measure EMP, researchers have pursued a structural approach, an ad hoc approach and have recently proposed a model-free EMP measure. Girton and Roper (1977) pioneered the EMP concept by using a structural monetary model while in a related theoretical article Roper and Turnovsky (1980) used an IS-LM frame- work to measure EMP. Weymark (1995; 1998) derived EMP through a small open economy model and established a model-free definition of EMP. Weymark defined EMP as: “... the total excess demand for a currency in international markets as the exchange rate that would have been required to remove this excess demand in the absence of exchange market intervention, given the expectations generated by the exchange rate policy actually implemented” (Weymark, 1995:278) She stressed that EMP is not synonymous with the exchange rate that would have been observed under a pure float because “expectations associated with a pure float will differ than those held under the policy actually implemented” (p.280). Weymark further asserted that EMP is “therefore best viewed as a measure of the size of external balance, and, as such, is a useful measure of the magnitude of speculative attacks” (p.280). This model-free definition of EMP became generally adopted in the EMP literature. However, Weymark (1998) also concluded that structural EMP measures remain model specific and, thus, suffer from the limitations of the underlying model. Eichengreen, Rose and Wyplosz (1996) developed an alternative ad hoc EMP approach. They constructed their composite EMP measure by using the exchange rate change, reserve changes and also the interest rate differential. They pointed to the “tenuous con- nection between the exchange rate and economic fundamentals” as a primary justification for the ad hoc measure (1996:16). However, a critique of their approach is that the choice of fundamental variables is arbitrary and subject to judgment. Eichengreen et al also men- tion the importance of accounting for capital controls but do not measure their influence due to a lack of satisfactory data and the inability to quantify it. Klaassen and Jager (2008), reconcile the structural and ad hoc approaches by prov- ing that their EMP can be derived under weak assumptions from any underlying exchange rate model. These assumptions are variable differentiability and constancy of weights. Thus, Klaassen and Jager’s EMP employs the change in the exchange rate, central bank’s foreign exchange rate demand scaled by foreign exchange turnover on that day and the real interest rate differential but in level form. Pressure is shown by the difference between the actual real interest rate and the one the central bank would set in the absence of ex- 189 S. Tatomir: Exchange Market Pressure on the Croatian Kuna Financial Theory and Practice 33 (2) 187-199 (2009) change rate considerations. Authors approximate the desired real interest rate as the foreign real interest rate corrected for the inflation differential. While their proposed EMP measure is novel in many aspects, Klaassen and Jager do not address how to measure capital controls, a topic still unaddressed in the literature. The specification of EMP has varied over the past few decades resulting in structural and ad hoc approaches. Recently, there has also been a proposal for a new model-free EMP measure.

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